The requirement for relining occurs when bone and tissues change due to shrinkage.
Possible causes may be:
The bite position, existing teeth and acrylic base(s) must be in good condition and not worn or stained to provide a reline procedure.
An impression of your oral tissue is taken inside your denture(s) to provide a working model. New acrylic base material is added to your denture to produce a correct fit. The appearance of your dentures will not change.
This procedure is similar to relining. The difference being is that a rebase replaces all the pink-acrylic denture base material. The existing teeth remain in the exact same place.
Reasons for rebase procedure:
Repairs restore a fractured or damaged denture close to its original condition. Most denturists can provide denture repair procedures on a same day basis.